little math problem October 2018

[Albert Chan]

Instead of finding each other, program one to to hide, the other to chase.

The chaser will visit an area, and place a flag to highest terrain.
Then he visit another area within eye-sight distance of first flag, and plant a second ...

The hider will also visit area with highest terrain.
If he see a flag, immediately turn around, and run in opposite direction

Eventually, the hider will be cornered ...